Ryoei Ichijo (Goki Maeda) is the son of the Ichijo family who founded a large conglomerate. His life is perfect, but, one day, he has an accident and falls into a coma. Meanwhile, Natsumi Morikawa (Sayu Kubota) gets into a different accident on the same day and at the same time as Ryoei Ichijo. Natsumi Morikawa also falls into a coma due to her accident, but she miraculously wakes up from her coma. A couple of weeks later, she is discharged from the hospital. Finally she goes back to her home. What awaits for her there is Ryoei Ichijo as a ghost. He tells her that she owes him her life even though she doesn't remember why. He tells her that she is the only one he can rely on and he asks her to do something for him.
